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132 lines
4.7 KiB
C++
132 lines
4.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef nsTextEditRules_h__
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#define nsTextEditRules_h__
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#include "nsIEditor.h"
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#include "nsEditRules.h"
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#include "nsCOMPtr.h"
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#include "nsIDOMNode.h"
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#include "TypeInState.h"
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class PlaceholderTxn;
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class nsTextEditor;
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/** Object that encapsulates HTML text-specific editing rules.
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*
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* To be a good citizen, edit rules must live by these restrictions:
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* 1. All data manipulation is through the editor.
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* Content nodes in the document tree must <B>not</B> be manipulated directly.
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* Content nodes in document fragments that are not part of the document itself
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* may be manipulated at will. Operations on document fragments must <B>not</B>
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* go through the editor.
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* 2. Selection must not be explicitly set by the rule method.
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* Any manipulation of Selection must be done by the editor.
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*/
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class nsTextEditRules : public nsEditRules
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{
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public:
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nsTextEditRules();
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virtual ~nsTextEditRules();
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// nsEditRules methods
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NS_IMETHOD Init(nsIEditor *aEditor);
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NS_IMETHOD WillDoAction(nsIDOMSelection *aSelection, nsRulesInfo *aInfo, PRBool *aCancel);
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NS_IMETHOD DidDoAction(nsIDOMSelection *aSelection, nsRulesInfo *aInfo, nsresult aResult);
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// nsTextEditRules action id's
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enum
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{
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kUndo = 1000,
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kRedo = 1001,
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kInsertText = 2000,
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kDeleteSelection = 2001
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};
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protected:
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// nsTextEditRules implementation methods
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nsresult WillInsertText(nsIDOMSelection *aSelection,
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PRBool *aCancel,
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PlaceholderTxn **aTxn,
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const nsString *inString,
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nsString *outString,
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TypeInState typeInState);
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nsresult DidInsertText(nsIDOMSelection *aSelection, nsresult aResult);
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nsresult CreateStyleForInsertText(nsIDOMSelection *aSelection, TypeInState &aTypeInState);
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nsresult WillInsert(nsIDOMSelection *aSelection, PRBool *aCancel);
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nsresult DidInsert(nsIDOMSelection *aSelection, nsresult aResult);
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nsresult WillDeleteSelection(nsIDOMSelection *aSelection, PRBool *aCancel);
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nsresult DidDeleteSelection(nsIDOMSelection *aSelection, nsresult aResult);
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nsresult WillUndo(nsIDOMSelection *aSelection, PRBool *aCancel);
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nsresult DidUndo(nsIDOMSelection *aSelection, nsresult aResult);
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nsresult WillRedo(nsIDOMSelection *aSelection, PRBool *aCancel);
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nsresult DidRedo(nsIDOMSelection *aSelection, nsresult aResult);
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// helper functions
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static PRBool NodeIsType(nsIDOMNode *aNode, nsIAtom *aTag);
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static PRBool IsEditable(nsIDOMNode *aNode);
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/** insert aNode into a new style node of type aTag.
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* aSelection is optional. If provided, aSelection is set to (aNode, 0)
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* if aNode was successfully placed in a new style node
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*/
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nsresult InsertStyleNode(nsIDOMNode *aNode,
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nsIAtom *aTag,
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nsIDOMSelection *aSelection);
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/** create a new style node of type aTag in aParentNode, and put a new text node
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* in the new style node.
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* If aSelection is provided and points to a text node, just call InsertStyleNode instead.
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* aSelection is optional. If provided, aSelection is set to (newTextNode, 0)
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* if newTextNode was successfully created.
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*/
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nsresult InsertStyleAndNewTextNode(nsIDOMNode *aParentNode,
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nsIAtom *aTag,
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nsIDOMSelection *aSelection);
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// data
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nsTextEditor *mEditor; // note that we do not refcount the editor
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nsCOMPtr<nsIDOMNode> mBogusNode; // magic node acts as placeholder in empty doc
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};
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class nsTextRulesInfo : public nsRulesInfo
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{
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public:
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nsTextRulesInfo(int aAction) : nsRulesInfo(aAction),placeTxn(0),inString(0),outString(0),typeInState() {}
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virtual ~nsTextRulesInfo() {}
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// used by kInsertText
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PlaceholderTxn **placeTxn;
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const nsString *inString;
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nsString *outString;
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TypeInState typeInState;
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};
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#endif //nsTextEditRules_h__
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